Well I think, once you mention weather, that much of the Northeast is excluded. I grew up in the NYC area and when I left there in 1980 it wasn't exactly the cycling friendly city that I see it as being today. I now live in South Jersey (Burlington) and have grown rather fond of riding in Philadelpha. I have noticed that most of the drivers are very courteous to cyclists and there is a great trail that goes out from Center City out to Valley Forge and beyond (The Schuylkill River Trail)...not to mention that Philly holds what used to be the US Pro Championships every June (now the Pennsylvania Triple Crown). The best part is that I don't even need to drive into the city to ride there since I can just hop on the local light rail train, with my bike, to get there.
Cheers,
Brian
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